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Bob Cat Copy Falcon 120 Jet

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Old 01-11-2019, 04:43 PM
  #4951  
SeaHawk-RCU
 
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Originally Posted by john491 View Post
C G is 12-3/4" to 13" aft leading edge of the wing at the root. Just about the leading edge of the belly hatch,
John
Do you have a Falcon 1.20 Lior? They are great fun on an 8kg turbine.

Col
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Old 01-11-2019, 10:35 PM
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Originally Posted by SeaHawk-RCU View Post
Do you have a Falcon 1.20 Lior? They are great fun on an 8kg turbine.

Col
no i do not. im helping a friend set his up for the maiden.
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Old 01-11-2019, 11:47 PM
  #4953  
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I have had 5. I love them (after a bit of work).
Here are some of them. When I work how to shrink pics.

Col.

Last edited by SeaHawk-RCU; 01-11-2019 at 11:50 PM.
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Old 01-11-2019, 11:52 PM
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Last edited by SeaHawk-RCU; 01-12-2019 at 12:05 AM.
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Old 01-12-2019, 03:59 AM
  #4955  
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like the one with the tip tanks
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Old 01-12-2019, 05:18 PM
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Originally Posted by Xairflyer View Post
like the one with the tip tanks
That one is the only one I didn't mod myself. The colour scheme is fantastic for visibility against any sky. The tip tanks added a lot of drag but look great.

Col
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Old 01-16-2019, 10:18 AM
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Hello guys.
im setting a Falcon 120 for my buddy with a JJ1400 turbine.
in order to achieve CG at 330mm back from leading edge, we have to add about 300g of lead in tail. does this sound right to you?
this is with three 2s lipo packs 2200mah in front of fuel tank.

attached are pics of the jet.
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Old 01-16-2019, 10:41 AM
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Originally Posted by i3dm View Post
Hello guys.
im setting a Falcon 120 for my buddy with a JJ1400 turbine.
in order to achieve CG at 330mm back from leading edge, we have to add about 300g of lead in tail. does this sound right to you?
I think its fine. I had a kingtech k80 on mine (about 1300g) and still added about 200g far end of the tail booms. Seems the JJ1400 is lighter at around 970g. Adding 300g more to the tail is normal to me.
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Old 01-16-2019, 10:50 AM
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On my Fly-Model Navy Cat (basically the same plane), I have my 3S 2100 LiFe ECU battery under the fuel tank, on top of the hatch that you use to access the rear wing bolts, I have (2) 2S 2100 LiFe about 4-5" forward of the first former in front of the fuel tank, not shown in the picture above, but they mount just behind the cortex
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Old 01-16-2019, 03:27 PM
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I put a 2700mah 2 cell and two 1250mah rx batteries in the wing bolt hatch , under the fuel tank. I only run 1 elevator servo, mini servos on the rudders, with a lighter turbine (Super Bee). No tail weight needed.
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Old 01-16-2019, 03:42 PM
  #4961  
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Same here 3 x 2200 placed through hatch where wing bolts are, held in place with Velcro physically as far back as possible and no lead needed to balance and I made 3 litre epoxy tank

Alan
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Old 01-17-2019, 12:26 PM
  #4962  
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are you guys without lead using 330mm behind LE root for CG?
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Old 01-17-2019, 12:39 PM
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Yes, I remember 13” which is 330mm. No tail weight needed.
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Old 01-17-2019, 02:28 PM
  #4964  
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Originally Posted by i3dm View Post
are you guys without lead using 330mm behind LE root for CG?
Yes, that's correct.
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